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Finding the Fourth Proportional to 917,316,672.60, 1,287,871,312.20 and 917,316,672.60

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Solution

The fourth proportional to 917,316,672.60, 1,287,871,312.20 and 917,316,672.60 is: 1,287,871,312.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,316,672.60 : 1,287,871,312.20 = 917,316,672.60 : x
  2. Step 2: Convert to fraction form
    917,316,672.60/1,287,871,312.20 = 917,316,672.60/x
  3. Step 3: Cross multiply
    917,316,672.60x = 1,287,871,312.20 × 917,316,672.60
  4. Step 4: Simplify right side
    917,316,672.60x = 1,181,385,826,844,299,776
  5. Step 5: Solve for x
    x = 1,181,385,826,844,299,776/917,316,672.60
  6. Step 6: Final answer
    x = 1,287,871,312.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.