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Finding the Fourth Proportional to 390,266.04, 538,657.13 and 254,062.76

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Solution

The fourth proportional to 390,266.04, 538,657.13 and 254,062.76 is: 350,665.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,266.04 : 538,657.13 = 254,062.76 : x
  2. Step 2: Convert to fraction form
    390,266.04/538,657.13 = 254,062.76/x
  3. Step 3: Cross multiply
    390,266.04x = 538,657.13 × 254,062.76
  4. Step 4: Simplify right side
    390,266.04x = 136,852,717,141.48
  5. Step 5: Solve for x
    x = 136,852,717,141.48/390,266.04
  6. Step 6: Final answer
    x = 350,665.20

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1.5x scale

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.