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Finding the Fourth Proportional to 977,708.40, 1,272,420.60 and 977,708.40

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Solution

The fourth proportional to 977,708.40, 1,272,420.60 and 977,708.40 is: 1,272,420.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    977,708.40 : 1,272,420.60 = 977,708.40 : x
  2. Step 2: Convert to fraction form
    977,708.40/1,272,420.60 = 977,708.40/x
  3. Step 3: Cross multiply
    977,708.40x = 1,272,420.60 × 977,708.40
  4. Step 4: Simplify right side
    977,708.40x = 1,244,056,308,953.04
  5. Step 5: Solve for x
    x = 1,244,056,308,953.04/977,708.40
  6. Step 6: Final answer
    x = 1,272,420.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.