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Finding the Fourth Proportional to 644,510.79, 889,394.72 and 358,048.35

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Solution

The fourth proportional to 644,510.79, 889,394.72 and 358,048.35 is: 494,089.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,510.79 : 889,394.72 = 358,048.35 : x
  2. Step 2: Convert to fraction form
    644,510.79/889,394.72 = 358,048.35/x
  3. Step 3: Cross multiply
    644,510.79x = 889,394.72 × 358,048.35
  4. Step 4: Simplify right side
    644,510.79x = 318,446,310,204.47
  5. Step 5: Solve for x
    x = 318,446,310,204.47/644,510.79
  6. Step 6: Final answer
    x = 494,089.96

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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.