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Finding the Fourth Proportional to 670,055.90, 924,892.63 and 428,987.75

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Solution

The fourth proportional to 670,055.90, 924,892.63 and 428,987.75 is: 592,141.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,055.90 : 924,892.63 = 428,987.75 : x
  2. Step 2: Convert to fraction form
    670,055.90/924,892.63 = 428,987.75/x
  3. Step 3: Cross multiply
    670,055.90x = 924,892.63 × 428,987.75
  4. Step 4: Simplify right side
    670,055.90x = 396,767,602,638.35
  5. Step 5: Solve for x
    x = 396,767,602,638.35/670,055.90
  6. Step 6: Final answer
    x = 592,141.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.