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Finding the Fourth Proportional to 867,335.20, 1,301,002.80 and 778,980.40

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Solution

The fourth proportional to 867,335.20, 1,301,002.80 and 778,980.40 is: 1,168,470.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,335.20 : 1,301,002.80 = 778,980.40 : x
  2. Step 2: Convert to fraction form
    867,335.20/1,301,002.80 = 778,980.40/x
  3. Step 3: Cross multiply
    867,335.20x = 1,301,002.80 × 778,980.40
  4. Step 4: Simplify right side
    867,335.20x = 1,013,455,681,545.12
  5. Step 5: Solve for x
    x = 1,013,455,681,545.12/867,335.20
  6. Step 6: Final answer
    x = 1,168,470.60

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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.