Home / 861,277,009.40-1,291,915,514.10-402,111,985.40

Finding the Fourth Proportional to 861,277,009.40, 1,291,915,514.10 and 402,111,985.40

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Solution

The fourth proportional to 861,277,009.40, 1,291,915,514.10 and 402,111,985.40 is: 603,167,978.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,277,009.40 : 1,291,915,514.10 = 402,111,985.40 : x
  2. Step 2: Convert to fraction form
    861,277,009.40/1,291,915,514.10 = 402,111,985.40/x
  3. Step 3: Cross multiply
    861,277,009.40x = 1,291,915,514.10 × 402,111,985.40
  4. Step 4: Simplify right side
    861,277,009.40x = 519,494,712,343,812,608
  5. Step 5: Solve for x
    x = 519,494,712,343,812,608/861,277,009.40
  6. Step 6: Final answer
    x = 603,167,978.10

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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.