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Finding the Fourth Proportional to 659,587.20, 989,186.40 and 260,095.20

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Solution

The fourth proportional to 659,587.20, 989,186.40 and 260,095.20 is: 390,066.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,587.20 : 989,186.40 = 260,095.20 : x
  2. Step 2: Convert to fraction form
    659,587.20/989,186.40 = 260,095.20/x
  3. Step 3: Cross multiply
    659,587.20x = 989,186.40 × 260,095.20
  4. Step 4: Simplify right side
    659,587.20x = 257,282,634,545.28
  5. Step 5: Solve for x
    x = 257,282,634,545.28/659,587.20
  6. Step 6: Final answer
    x = 390,066.14

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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.