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Finding the Fourth Proportional to 710,203.10, 980,075.28 and 387,913.28

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Solution

The fourth proportional to 710,203.10, 980,075.28 and 387,913.28 is: 535,317.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,203.10 : 980,075.28 = 387,913.28 : x
  2. Step 2: Convert to fraction form
    710,203.10/980,075.28 = 387,913.28/x
  3. Step 3: Cross multiply
    710,203.10x = 980,075.28 × 387,913.28
  4. Step 4: Simplify right side
    710,203.10x = 380,184,216,511.72
  5. Step 5: Solve for x
    x = 380,184,216,511.72/710,203.10
  6. Step 6: Final answer
    x = 535,317.60

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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.