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Finding the Fourth Proportional to 710,808.76, 1,065,686.42 and 430,259.64

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Solution

The fourth proportional to 710,808.76, 1,065,686.42 and 430,259.64 is: 645,070.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,808.76 : 1,065,686.42 = 430,259.64 : x
  2. Step 2: Convert to fraction form
    710,808.76/1,065,686.42 = 430,259.64/x
  3. Step 3: Cross multiply
    710,808.76x = 1,065,686.42 × 430,259.64
  4. Step 4: Simplify right side
    710,808.76x = 458,521,855,422.09
  5. Step 5: Solve for x
    x = 458,521,855,422.09/710,808.76
  6. Step 6: Final answer
    x = 645,070.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.