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Finding the Fourth Proportional to 661,663.48, 913,303.74 and 375,373.84

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Solution

The fourth proportional to 661,663.48, 913,303.74 and 375,373.84 is: 518,133.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,663.48 : 913,303.74 = 375,373.84 : x
  2. Step 2: Convert to fraction form
    661,663.48/913,303.74 = 375,373.84/x
  3. Step 3: Cross multiply
    661,663.48x = 913,303.74 × 375,373.84
  4. Step 4: Simplify right side
    661,663.48x = 342,830,331,970.16
  5. Step 5: Solve for x
    x = 342,830,331,970.16/661,663.48
  6. Step 6: Final answer
    x = 518,133.98

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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.